My reading of your graph suggests the outages mostly last about 2 mins.
As it happens this is roughly the time the superhub3 modem takes to boot. It might be worth checking its "uptime" to see if this corresponds to an outage. In modem mode this is available at http://192.168.100.1 login then Admin / Info.
Lost connection a few times again this morning, once for around 3 minutes, once for around 8 minutes.
The uptime on the modem is over 2 days, which is when I tried a reboot to see if that would sort the problem.
There is definitely an issue with the network or cabling outside my house or in the street.
Are any Virgin staff monitoring here? Ringing Virgin is a complete non-starter and an exercise in extreme frustration. I'm too busy to try and explain to somebody that I everything is plugged in as it should and I'm not using wifi etc etc.
Thanks for posting on our community forums. Sorry to hear you're having issues with our internet services and regular drop out of connections, we understand the frustration this is causing.
Remotely looking from our end with the details you have provided though your community profile, we have located your account. There is nothing showing that could be causing these issues. All power levels are within specification and there are no area faults affecting you.
As you posted a short while ago has everything been stable since your last post?
Please let us know regarding the above and we can assist you further.